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Date: Wed, 6 Nov 2019 16:01:55 -0300
From: Helen Koike <helen.koike@...labora.com>
To: Guilherme Alcarde Gallo <gagallo7@...il.com>
Cc: Danilo Figueiredo Rocha <drocha.figueiredo@...il.com>,
Shuah Khan <skhan@...uxfoundation.org>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
hverkuil-cisco@...all.nl, lkcamp@...ts.libreplanetbr.org,
Kieran Bingham <kieran.bingham@...asonboard.com>,
Jacopo Mondi <jacopo@...ndi.org>,
Laurent Pinchart <laurent.pinchart@...asonboard.com>,
Niklas Söderlund <niklas.soderlund@...natech.se>,
Gabriela Bittencourt <gabrielabittencourt00@...il.com>,
pedro@...raco.de
Subject: Re: [Lkcamp] [PATCH v3] media: vimc: Implement get/set selection in
sink
On 11/6/19 12:58 PM, Guilherme Alcarde Gallo wrote:
> Hi Helen,
> Thanks for the prompt review!
>
> Just one comment below.
>
> On Wed, Nov 6, 2019 at 11:01 AM Helen Koike <helen.koike@...labora.com> wrote:
>>
>> Hi Danilo and Guilherme,
>>
>> On 11/5/19 11:12 PM, Danilo Figueiredo Rocha wrote:
>>> From: Guilherme Alcarde Gallo <gagallo7@...il.com>
>>>
>>> Add support for the sink pad of scaler subdevice to respond
>>> VIDIOC_G_SELECTION and VIDIOC_S_SELECTION ioctls with the following
>>> targets: V4L2_SEL_TGT_COMPOSE_BOUNDS and V4L2_SEL_TGT_CROP.
>>>
>>> * Add new const struct crop_rect_default to initialize subdev scaler
>>> properly.
>>> * Make changes in sink pad format reflect to the crop rectangle. E.g.
>>> changing the frame format to a smaller size one can make the former
>>> crop rectangle selects a non existing frame area. To solve this
>>> situation the crop rectangle is clamped to the frame boundaries.
>>> * Clamp crop rectangle respecting the sink bounds during set_selection
>>> ioctl.
>>>
>>> Signed-off-by: Guilherme Alcarde Gallo <gagallo7@...il.com>
>>> Co-developed-by: Danilo Figueiredo Rocha <drocha.figueiredo@...il.com>
>>> Signed-off-by: Danilo Figueiredo Rocha <drocha.figueiredo@...il.com>
>>
>> Thanks for the patch, lgtm, just minor nitpicking comments below.
>>
>> Also, I'm adding libcamera people in CC, as this might require updating it.
>>
>> And I'm also adding Gabriela and Pedro in CC, as this might require some
>> changes in patch "media: vimc: Enable set resolution at the scaler src pad",
>> which removes the hardcoded scaling factor.
>>
>>>
>>> ---
>>> Changes in V3:
>>> * Sort the headers in alphabetical order.
>>> * Change all functions prefix to 'vimc_sca_'.
>>> * Remove useless case.
>>> * Change commit message subject.
>>>
>>> Changes in V2:
>>> * Use v4l2_rect_map_inside to clamp the crop rectangle.
>>> * Do the crop rectangle clamping after changing sink format.
>>> * Implement try ioctls for selection with CROP* targets.
>>> * Treat tiny rectangles with area smaller than minimal dimensions of vimc
>>> frames.
>>> * Allow user to get selection when the streaming is on.
>>> * Reuse bound rectangle generation in a static function.
>>> * Disable get_selection for Source pads as we did before with
>>> set_selection.
>>> ---
>>> drivers/media/platform/vimc/vimc-scaler.c | 170 ++++++++++++++++++++--
>>> 1 file changed, 154 insertions(+), 16 deletions(-)
>>>
>>> diff --git a/drivers/media/platform/vimc/vimc-scaler.c b/drivers/media/platform/vimc/vimc-scaler.c
>>> index 2f88a7d9d67b..935bb0e0d0ee 100644
>>> --- a/drivers/media/platform/vimc/vimc-scaler.c
>>> +++ b/drivers/media/platform/vimc/vimc-scaler.c
>>> @@ -6,8 +6,9 @@
>>> */
>>>
>>> #include <linux/moduleparam.h>
>>> -#include <linux/vmalloc.h>
>>> #include <linux/v4l2-mediabus.h>
>>> +#include <linux/vmalloc.h>
>>
>> I think you moved this one by accident?
>> Please, send v4 fixing this.
> Actually we sorted the include headers as you requested in the last review.
> Is there any rule about how to sort the headers?
Yes, but the order should be
#include <linux/...>
#include <media/v4l2-rect.h>
#include <media/v4l2-subdev.h>
What I meant in previous review is that your patch should include media/v4l2-rect.h
before media/v4l2-subdev.h.
The order between linux/vmalloc.h and linux/v4l2-mediabus.h shouldn't matter for this patch,
as you are not modifying those.
Make sense?
Thanks,
Helen
>>
>>> +#include <media/v4l2-rect.h>
>>> #include <media/v4l2-subdev.h>
>>>
>>> #include "vimc-common.h"
>>> @@ -18,6 +19,9 @@ MODULE_PARM_DESC(sca_mult, " the image size multiplier");
>>>
>>> #define MAX_ZOOM 8
>>>
>>> +#define VIMC_SCA_FMT_WIDTH_DEFAULT 640
>>> +#define VIMC_SCA_FMT_HEIGHT_DEFAULT 480
>>> +
>>> struct vimc_sca_device {
>>> struct vimc_ent_device ved;
>>> struct v4l2_subdev sd;
>>> @@ -25,6 +29,7 @@ struct vimc_sca_device {
>>> * with the width and hight multiplied by mult
>>> */
>>> struct v4l2_mbus_framefmt sink_fmt;
>>> + struct v4l2_rect crop_rect;
>>> /* Values calculated when the stream starts */
>>> u8 *src_frame;
>>> unsigned int src_line_size;
>>> @@ -33,22 +38,64 @@ struct vimc_sca_device {
>>> };
>>>
>>> static const struct v4l2_mbus_framefmt sink_fmt_default = {
>>> - .width = 640,
>>> - .height = 480,
>>> + .width = VIMC_SCA_FMT_WIDTH_DEFAULT,
>>> + .height = VIMC_SCA_FMT_HEIGHT_DEFAULT,
>>> .code = MEDIA_BUS_FMT_RGB888_1X24,
>>> .field = V4L2_FIELD_NONE,
>>> .colorspace = V4L2_COLORSPACE_DEFAULT,
>>> };
>>>
>>> +static const struct v4l2_rect crop_rect_default = {
>>> + .width = VIMC_SCA_FMT_WIDTH_DEFAULT,
>>> + .height = VIMC_SCA_FMT_HEIGHT_DEFAULT,
>>> + .top = 0,
>>> + .left = 0,
>>> +};
>>> +
>>> +static const struct v4l2_rect crop_rect_min = {
>>> + .width = VIMC_FRAME_MIN_WIDTH,
>>> + .height = VIMC_FRAME_MIN_HEIGHT,
>>> + .top = 0,
>>> + .left = 0,
>>> +};
>>> +
>>> +static struct v4l2_rect
>>> +vimc_sca_get_crop_bound_sink(const struct v4l2_mbus_framefmt *sink_fmt)
>>> +{
>>> + /* Get the crop bounds to clamp the crop rectangle correctly */
>>> + struct v4l2_rect r = {
>>> + .left = 0,
>>> + .top = 0,
>>> + .width = sink_fmt->width,
>>> + .height = sink_fmt->height,
>>> + };
>>> + return r;
>>> +}
>>> +
>>> +static void vimc_sca_adjust_sink_crop(struct v4l2_rect *r,
>>> + const struct v4l2_mbus_framefmt *sink_fmt)
>>> +{
>>> + const struct v4l2_rect sink_rect =
>>> + vimc_sca_get_crop_bound_sink(sink_fmt);
>>> +
>>> + /* Disallow rectangles smaller than the minimal one. */
>>> + v4l2_rect_set_min_size(r, &crop_rect_min);
>>> + v4l2_rect_map_inside(r, &sink_rect);
>>> +}
>>> +
>>> static int vimc_sca_init_cfg(struct v4l2_subdev *sd,
>>> struct v4l2_subdev_pad_config *cfg)
>>> {
>>> struct v4l2_mbus_framefmt *mf;
>>> + struct v4l2_rect *r;
>>> unsigned int i;
>>>
>>> mf = v4l2_subdev_get_try_format(sd, cfg, 0);
>>> *mf = sink_fmt_default;
>>>
>>> + r = v4l2_subdev_get_try_crop(sd, cfg, 0);
>>> + *r = crop_rect_default;
>>> +
>>> for (i = 1; i < sd->entity.num_pads; i++) {
>>> mf = v4l2_subdev_get_try_format(sd, cfg, i);
>>> *mf = sink_fmt_default;
>>> @@ -107,16 +154,21 @@ static int vimc_sca_get_fmt(struct v4l2_subdev *sd,
>>> struct v4l2_subdev_format *format)
>>> {
>>> struct vimc_sca_device *vsca = v4l2_get_subdevdata(sd);
>>> + struct v4l2_rect *crop_rect;
>>>
>>> /* Get the current sink format */
>>> - format->format = (format->which == V4L2_SUBDEV_FORMAT_TRY) ?
>>> - *v4l2_subdev_get_try_format(sd, cfg, 0) :
>>> - vsca->sink_fmt;
>>> + if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
>>> + format->format = *v4l2_subdev_get_try_format(sd, cfg, 0);
>>> + crop_rect = v4l2_subdev_get_try_crop(sd, cfg, 0);
>>> + } else {
>>> + format->format = vsca->sink_fmt;
>>> + crop_rect = &vsca->crop_rect;
>>> + }
>>>
>>> /* Scale the frame size for the source pad */
>>> if (VIMC_IS_SRC(format->pad)) {
>>> - format->format.width = vsca->sink_fmt.width * sca_mult;
>>> - format->format.height = vsca->sink_fmt.height * sca_mult;
>>> + format->format.width = crop_rect->width * sca_mult;
>>> + format->format.height = crop_rect->height * sca_mult;
>>> }
>>>
>>> return 0;
>>> @@ -148,6 +200,7 @@ static int vimc_sca_set_fmt(struct v4l2_subdev *sd,
>>> {
>>> struct vimc_sca_device *vsca = v4l2_get_subdevdata(sd);
>>> struct v4l2_mbus_framefmt *sink_fmt;
>>> + struct v4l2_rect *crop_rect;
>>>
>>> if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
>>> /* Do not change the format while stream is on */
>>> @@ -155,8 +208,10 @@ static int vimc_sca_set_fmt(struct v4l2_subdev *sd,
>>> return -EBUSY;
>>>
>>> sink_fmt = &vsca->sink_fmt;
>>> + crop_rect = &vsca->crop_rect;
>>> } else {
>>> sink_fmt = v4l2_subdev_get_try_format(sd, cfg, 0);
>>> + crop_rect = v4l2_subdev_get_try_crop(sd, cfg, 0);
>>> }
>>>
>>> /*
>>> @@ -165,8 +220,8 @@ static int vimc_sca_set_fmt(struct v4l2_subdev *sd,
>>> */
>>> if (VIMC_IS_SRC(fmt->pad)) {
>>> fmt->format = *sink_fmt;
>>> - fmt->format.width = sink_fmt->width * sca_mult;
>>> - fmt->format.height = sink_fmt->height * sca_mult;
>>> + fmt->format.width = crop_rect->width * sca_mult;
>>> + fmt->format.height = crop_rect->height * sca_mult;
>>> } else {
>>> /* Set the new format in the sink pad */
>>> vimc_sca_adjust_sink_fmt(&fmt->format);
>>> @@ -184,6 +239,80 @@ static int vimc_sca_set_fmt(struct v4l2_subdev *sd,
>>> fmt->format.xfer_func, fmt->format.ycbcr_enc);
>>>
>>> *sink_fmt = fmt->format;
>>> +
>>> + /* Do the crop, but respect the current bounds */
>>> + vimc_sca_adjust_sink_crop(crop_rect, sink_fmt);
>>> + }
>>> +
>>> + return 0;
>>> +}
>>> +
>>> +static int vimc_sca_get_selection(struct v4l2_subdev *sd,
>>> + struct v4l2_subdev_pad_config *cfg,
>>> + struct v4l2_subdev_selection *sel)
>>> +{
>>> + struct vimc_sca_device *vsca = v4l2_get_subdevdata(sd);
>>> + struct v4l2_mbus_framefmt *sink_fmt;
>>> + struct v4l2_rect *crop_rect;
>>> +
>>> + if (VIMC_IS_SRC(sel->pad))
>>> + return -EINVAL;
>>> +
>>> + if (sel->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
>>> + sink_fmt = &vsca->sink_fmt;
>>> + crop_rect = &vsca->crop_rect;
>>> + } else {
>>> + sink_fmt = v4l2_subdev_get_try_format(sd, cfg, 0);
>>> + crop_rect = v4l2_subdev_get_try_crop(sd, cfg, 0);
>>> + }
>>> +
>>> + switch (sel->target) {
>>> + case V4L2_SEL_TGT_CROP:
>>> + sel->r = *crop_rect;
>>> + break;
>>> + case V4L2_SEL_TGT_CROP_BOUNDS:
>>> + sel->r = vimc_sca_get_crop_bound_sink(sink_fmt);
>>> + break;
>>> + default:
>>> + return -EINVAL;
>>> + }
>>> +
>>> + return 0;
>>> +}
>>> +
>>> +static int vimc_sca_set_selection(struct v4l2_subdev *sd,
>>> + struct v4l2_subdev_pad_config *cfg,
>>> + struct v4l2_subdev_selection *sel)
>>> +{
>>> + struct vimc_sca_device *vsca = v4l2_get_subdevdata(sd);
>>> + struct v4l2_rect *crop_rect;
>>> + struct v4l2_rect sink_rect;
>>> + struct v4l2_mbus_framefmt *sink_fmt;
>>
>> Do you mind declaring this just after vsca? I was trying to put bigger lines first in the declaration order.
>>
>>> +
>>> + if (VIMC_IS_SRC(sel->pad))
>>> + return -EINVAL;
>>> +
>>> + if (sel->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
>>> + /* Do not change the format while stream is on */
>>> + if (vsca->src_frame)
>>> + return -EBUSY;
>>> +
>>> + crop_rect = &vsca->crop_rect;
>>> + sink_fmt = &vsca->sink_fmt;
>>> + } else {
>>> + crop_rect = v4l2_subdev_get_try_crop(sd, cfg, 0);
>>> + sink_fmt = v4l2_subdev_get_try_format(sd, cfg, 0);
>>> + }
>>> +
>>> + switch (sel->target) {
>>> + case V4L2_SEL_TGT_CROP:
>>> + /* Do the crop, but respect the current bounds */
>>> + sink_rect = vimc_sca_get_crop_bound_sink(sink_fmt);
>>> + vimc_sca_adjust_sink_crop(&sel->r, sink_fmt);
>>> + *crop_rect = sel->r;
>>> + break;
>>> + default:
>>> + return -EINVAL;
>>> }
>>>
>>> return 0;
>>> @@ -195,6 +324,8 @@ static const struct v4l2_subdev_pad_ops vimc_sca_pad_ops = {
>>> .enum_frame_size = vimc_sca_enum_frame_size,
>>> .get_fmt = vimc_sca_get_fmt,
>>> .set_fmt = vimc_sca_set_fmt,
>>> + .get_selection = vimc_sca_get_selection,
>>> + .set_selection = vimc_sca_set_selection,
>>> };
>>>
>>> static int vimc_sca_s_stream(struct v4l2_subdev *sd, int enable)
>>> @@ -213,11 +344,11 @@ static int vimc_sca_s_stream(struct v4l2_subdev *sd, int enable)
>>> vsca->bpp = vpix->bpp;
>>>
>>> /* Calculate the width in bytes of the src frame */
>>> - vsca->src_line_size = vsca->sink_fmt.width *
>>> + vsca->src_line_size = vsca->crop_rect.width *
>>> sca_mult * vsca->bpp;
>>>
>>> /* Calculate the frame size of the source pad */
>>> - frame_size = vsca->src_line_size * vsca->sink_fmt.height *
>>> + frame_size = vsca->src_line_size * vsca->crop_rect.height *
>>> sca_mult;
>>>
>>> /* Allocate the frame buffer. Use vmalloc to be able to
>>> @@ -259,11 +390,12 @@ static void vimc_sca_fill_pix(u8 *const ptr,
>>> }
>>>
>>> static void vimc_sca_scale_pix(const struct vimc_sca_device *const vsca,
>>> - const unsigned int lin, const unsigned int col,
>>> + unsigned int lin, unsigned int col,
>>> const u8 *const sink_frame)
>>> {
>>> unsigned int i, j, index;
>>> const u8 *pixel;
>>> + const struct v4l2_rect crop_rect = vsca->crop_rect;
>>
>> Same here.
>>
>>>
>>> /* Point to the pixel value in position (lin, col) in the sink frame */
>>> index = VIMC_FRAME_INDEX(lin, col,
>>> @@ -278,8 +410,10 @@ static void vimc_sca_scale_pix(const struct vimc_sca_device *const vsca,
>>> /* point to the place we are going to put the first pixel
>>> * in the scaled src frame
>>> */
>>> + lin -= crop_rect.top;
>>> + col -= crop_rect.left;
>>> index = VIMC_FRAME_INDEX(lin * sca_mult, col * sca_mult,
>>> - vsca->sink_fmt.width * sca_mult, vsca->bpp);
>>> + crop_rect.width * sca_mult, vsca->bpp);
>>>
>>> dev_dbg(vsca->ved.dev, "sca: %s: scale_pix src pos %dx%d, index %d\n",
>>> vsca->sd.name, lin * sca_mult, col * sca_mult, index);
>>> @@ -308,11 +442,12 @@ static void vimc_sca_fill_src_frame(const struct vimc_sca_device *const vsca,
>>> const u8 *const sink_frame)
>>> {
>>> unsigned int i, j;
>>> + const struct v4l2_rect r = vsca->crop_rect;
>>
>> Same here.
>>
>>>
>>> /* Scale each pixel from the original sink frame */
>>> /* TODO: implement scale down, only scale up is supported for now */
>>> - for (i = 0; i < vsca->sink_fmt.height; i++)
>>> - for (j = 0; j < vsca->sink_fmt.width; j++)
>>> + for (i = r.top; i < r.top + r.height; i++)
>>> + for (j = r.left; j < r.left + r.width; j++)
>>> vimc_sca_scale_pix(vsca, i, j, sink_frame);
>>> }
>>>
>>> @@ -384,5 +519,8 @@ struct vimc_ent_device *vimc_sca_add(struct vimc_device *vimc,
>>> /* Initialize the frame format */
>>> vsca->sink_fmt = sink_fmt_default;
>>>
>>> + /* Initialize the crop selection */
>>> + vsca->crop_rect = crop_rect_default;
>>> +
>>> return &vsca->ved;
>>> }
>>>
>>
>> With these changes:
>>
>> Acked-by: Helen Koike <helen.koike@...labora.com>
>>
>> Thanks
>> Helen
>>
>> _______________________________________________
>> Lkcamp mailing list
>> Lkcamp@...ts.libreplanetbr.org
>> https://lists.libreplanetbr.org/mailman/listinfo/lkcamp
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